[9] but that the. P. [1] the--for that. [2] of--omitted. MS. and P. [3] at that instant. P. [4] that--for the. [5] unless--for until. [_A constant Water-flowing and ebbing motion_.] We are very much mistaken if this is not the result of one of the Marquis’s early experimental model demonstrations, and a happy illustrative example for the lecture-table of raising water by the condensation of steam. [Illustration: A water-flowing and ebbing motion] A, B, represents two water tanks or cisterns, permanently connected by the water-pipe C, and having within, D, D, two perforated shelves or false bottoms; E, is a main steam-pipe, with a four-way steam cock at F, branching into the form shown at G, G', and passing through the bottom of each tank, rises vertically to the level of the false bottoms, where each is supplied with a valve at the top end, to prevent the ingress of water. G', is shown receiving steam from E. H, I, are two hollow metal globes, surmounted with a small crown ornament to conceal a spring valve, to which a floating weight is suspended by a chain, as at X'; but floated upwards at X, where it operates to open the spring valve within the crown. In the above diagram, it is obvious that water placed in A, will flow onward to B, and stand at the same level in both cisterns. The valve in each globe requires to be so arranged, that when forced open its spring will prevent its closing until acted on by a weight, which weight must hang to the inside of the valve by means of a chain, and be able to float on the surface of the water, and it will be requisite to adjust the chain to such a length that when the water is at a certain level it shall have no influence on the float-weight of the valve, which will then close.